Home and Away's Maddy Osborne and Josh Barrett will be considered the main suspects over an arson attack in an upcoming storyline.
The police will inform Roo that they have footage of Maddy and boyfriend Josh prior to a fire breaking out at Mangrove River High.
Kassandra Clementi - who plays Maddy - said to TV Week: "The fire was pretty bad. The whole school is now unusable and the students have nowhere to go.
"Maddy and Josh were the last ones seen on the surveillance footage, as they were sleeping in the school when they had run away."
The situation puts pressure on Roo, who struggles to cope with the fact the teenagers were at the scene of the crime.
Clementi said: "Roo freaks out because she knows if there is hard evidence, they may be involved. She is scared Josh and Maddy could get into a lot of trouble.
"Roo thinks Josh is bad news. He has already caused a lot of damage and Maddy continues to be there for him. With Josh's track record, the fire is definitely something Roo thinks he could have done."
Home and Away airs weekdays at 1.15pm and 6pm on Channel 5 in the UK, and weekdays at 7pm on Network Seven in Australia.